/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/

/*
 *  Public Key layer for parsing key files and structures
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */

#include "tls/config.h"

#if defined(MBEDTLS_PK_PARSE_C)

#include "tls/pk.h"
#include "tls/asn1.h"
#include "tls/oid.h"

#include <string.h>

#if defined(MBEDTLS_RSA_C)
#include "tls/rsa.h"
#endif
#if defined(MBEDTLS_ECP_C)
#include "tls/ecp.h"
#endif
#if defined(MBEDTLS_ECDSA_C)
#include "tls/ecdsa.h"
#endif
#if defined(MBEDTLS_PEM_PARSE_C)
#include "tls/pem.h"
#endif
#if defined(MBEDTLS_PKCS5_C)
#include "tls/pkcs5.h"
#endif
#if defined(MBEDTLS_PKCS12_C)
#include "tls/pkcs12.h"
#endif

#if defined(MBEDTLS_PLATFORM_C)
#include "tls/platform.h"
#else
#include <stdlib.h>
#define mbedtls_calloc    calloc
#define mbedtls_free       free
#endif

#if defined(MBEDTLS_FS_IO)
/* Implementation that should never be optimized out by the compiler */
static void mbedtls_zeroize(void *v, size_t n)
{
	volatile unsigned char *p = v;
	while (n--) {
		*p++ = 0;
	}
}

/*
 * Load all data from a file into a given buffer.
 *
 * The file is expected to contain either PEM or DER encoded data.
 * A terminating null byte is always appended. It is included in the announced
 * length only if the data looks like it is PEM encoded.
 */
int mbedtls_pk_load_file(const char *path, unsigned char **buf, size_t *n)
{
	FILE *f;
	long size;

	if ((f = fopen(path, "rb")) == NULL) {
		return (MBEDTLS_ERR_PK_FILE_IO_ERROR);
	}

	fseek(f, 0, SEEK_END);
	if ((size = ftell(f)) == -1) {
		fclose(f);
		return (MBEDTLS_ERR_PK_FILE_IO_ERROR);
	}
	fseek(f, 0, SEEK_SET);

	*n = (size_t)size;

	if (*n + 1 == 0 || (*buf = mbedtls_calloc(1, *n + 1)) == NULL) {
		fclose(f);
		return (MBEDTLS_ERR_PK_ALLOC_FAILED);
	}

	if (fread(*buf, 1, *n, f) != *n) {
		fclose(f);
		mbedtls_free(*buf);
		return (MBEDTLS_ERR_PK_FILE_IO_ERROR);
	}

	fclose(f);

	(*buf)[*n] = '\0';

	if (strstr((const char *)*buf, "-----BEGIN ") != NULL) {
		++*n;
	}

	return (0);
}

/*
 * Load and parse a private key
 */
int mbedtls_pk_parse_keyfile(mbedtls_pk_context *ctx, const char *path, const char *pwd)
{
	int ret;
	size_t n;
	unsigned char *buf;

	if ((ret = mbedtls_pk_load_file(path, &buf, &n)) != 0) {
		return (ret);
	}

	if (pwd == NULL) {
		ret = mbedtls_pk_parse_key(ctx, buf, n, NULL, 0);
	} else {
		ret = mbedtls_pk_parse_key(ctx, buf, n, (const unsigned char *)pwd, strlen(pwd));
	}

	mbedtls_zeroize(buf, n);
	mbedtls_free(buf);

	return (ret);
}

/*
 * Load and parse a public key
 */
int mbedtls_pk_parse_public_keyfile(mbedtls_pk_context *ctx, const char *path)
{
	int ret;
	size_t n;
	unsigned char *buf;

	if ((ret = mbedtls_pk_load_file(path, &buf, &n)) != 0) {
		return (ret);
	}

	ret = mbedtls_pk_parse_public_key(ctx, buf, n);

	mbedtls_zeroize(buf, n);
	mbedtls_free(buf);

	return (ret);
}
#endif							/* MBEDTLS_FS_IO */

#if defined(MBEDTLS_ECP_C)
/* Minimally parse an ECParameters buffer to and mbedtls_asn1_buf
 *
 * ECParameters ::= CHOICE {
 *   namedCurve         OBJECT IDENTIFIER
 *   specifiedCurve     SpecifiedECDomain -- = SEQUENCE { ... }
 *   -- implicitCurve   NULL
 * }
 */
static int pk_get_ecparams(unsigned char **p, const unsigned char *end, mbedtls_asn1_buf *params)
{
	int ret;

	/* Tag may be either OID or SEQUENCE */
	params->tag = **p;
	if (params->tag != MBEDTLS_ASN1_OID
#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
		&& params->tag != (MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)
#endif
	   ) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_UNEXPECTED_TAG);
	}

	if ((ret = mbedtls_asn1_get_tag(p, end, &params->len, params->tag)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	params->p = *p;
	*p += params->len;

	if (*p != end) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	return (0);
}

#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
/*
 * Parse a SpecifiedECDomain (SEC 1 C.2) and (mostly) fill the group with it.
 * WARNING: the resulting group should only be used with
 * pk_group_id_from_specified(), since its base point may not be set correctly
 * if it was encoded compressed.
 *
 *  SpecifiedECDomain ::= SEQUENCE {
 *      version SpecifiedECDomainVersion(ecdpVer1 | ecdpVer2 | ecdpVer3, ...),
 *      fieldID FieldID {{FieldTypes}},
 *      curve Curve,
 *      base ECPoint,
 *      order INTEGER,
 *      cofactor INTEGER OPTIONAL,
 *      hash HashAlgorithm OPTIONAL,
 *      ...
 *  }
 *
 * We only support prime-field as field type, and ignore hash and cofactor.
 */
static int pk_group_from_specified(const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp)
{
	int ret;
	unsigned char *p = params->p;
	const unsigned char *const end = params->p + params->len;
	const unsigned char *end_field, *end_curve;
	size_t len;
	int ver;

	/* SpecifiedECDomainVersion ::= INTEGER { 1, 2, 3 } */
	if ((ret = mbedtls_asn1_get_int(&p, end, &ver)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (ver < 1 || ver > 3) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
	}

	/*
	 * FieldID { FIELD-ID:IOSet } ::= SEQUENCE { -- Finite field
	 *       fieldType FIELD-ID.&id({IOSet}),
	 *       parameters FIELD-ID.&Type({IOSet}{@fieldType})
	 * }
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (ret);
	}

	end_field = p + len;

	/*
	 * FIELD-ID ::= TYPE-IDENTIFIER
	 * FieldTypes FIELD-ID ::= {
	 *       { Prime-p IDENTIFIED BY prime-field } |
	 *       { Characteristic-two IDENTIFIED BY characteristic-two-field }
	 * }
	 * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end_field, &len, MBEDTLS_ASN1_OID)) != 0) {
		return (ret);
	}

	if (len != MBEDTLS_OID_SIZE(MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD) || memcmp(p, MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD, len) != 0) {
		return (MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
	}

	p += len;

	/* Prime-p ::= INTEGER -- Field of size p. */
	if ((ret = mbedtls_asn1_get_mpi(&p, end_field, &grp->P)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	grp->pbits = mbedtls_mpi_bitlen(&grp->P);

	if (p != end_field) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	/*
	 * Curve ::= SEQUENCE {
	 *       a FieldElement,
	 *       b FieldElement,
	 *       seed BIT STRING OPTIONAL
	 *       -- Shall be present if used in SpecifiedECDomain
	 *       -- with version equal to ecdpVer2 or ecdpVer3
	 * }
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (ret);
	}

	end_curve = p + len;

	/*
	 * FieldElement ::= OCTET STRING
	 * containing an integer in the case of a prime field
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 || (ret = mbedtls_mpi_read_binary(&grp->A, p, len)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	p += len;

	if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0 || (ret = mbedtls_mpi_read_binary(&grp->B, p, len)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	p += len;

	/* Ignore seed BIT STRING OPTIONAL */
	if ((ret = mbedtls_asn1_get_tag(&p, end_curve, &len, MBEDTLS_ASN1_BIT_STRING)) == 0) {
		p += len;
	}

	if (p != end_curve) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	/*
	 * ECPoint ::= OCTET STRING
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if ((ret = mbedtls_ecp_point_read_binary(grp, &grp->G, (const unsigned char *)p, len)) != 0) {
		/*
		 * If we can't read the point because it's compressed, cheat by
		 * reading only the X coordinate and the parity bit of Y.
		 */
		if (ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE || (p[0] != 0x02 && p[0] != 0x03) || len != mbedtls_mpi_size(&grp->P) + 1 || mbedtls_mpi_read_binary(&grp->G.X, p + 1, len - 1) != 0 || mbedtls_mpi_lset(&grp->G.Y, p[0] - 2) != 0 || mbedtls_mpi_lset(&grp->G.Z, 1) != 0) {
			return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
		}
	}

	p += len;

	/*
	 * order INTEGER
	 */
	if ((ret = mbedtls_asn1_get_mpi(&p, end, &grp->N)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	grp->nbits = mbedtls_mpi_bitlen(&grp->N);

	/*
	 * Allow optional elements by purposefully not enforcing p == end here.
	 */

	return (0);
}

/*
 * Find the group id associated with an (almost filled) group as generated by
 * pk_group_from_specified(), or return an error if unknown.
 */
static int pk_group_id_from_group(const mbedtls_ecp_group *grp, mbedtls_ecp_group_id *grp_id)
{
	int ret = 0;
	mbedtls_ecp_group ref;
	const mbedtls_ecp_group_id *id;

	mbedtls_ecp_group_init(&ref);

	for (id = mbedtls_ecp_grp_id_list(); *id != MBEDTLS_ECP_DP_NONE; id++) {
		/* Load the group associated to that id */
		mbedtls_ecp_group_free(&ref);
		MBEDTLS_MPI_CHK(mbedtls_ecp_group_load(&ref, *id));

		/* Compare to the group we were given, starting with easy tests */
		if (grp->pbits == ref.pbits && grp->nbits == ref.nbits && mbedtls_mpi_cmp_mpi(&grp->P, &ref.P) == 0 && mbedtls_mpi_cmp_mpi(&grp->A, &ref.A) == 0 && mbedtls_mpi_cmp_mpi(&grp->B, &ref.B) == 0 && mbedtls_mpi_cmp_mpi(&grp->N, &ref.N) == 0 && mbedtls_mpi_cmp_mpi(&grp->G.X, &ref.G.X) == 0 && mbedtls_mpi_cmp_mpi(&grp->G.Z, &ref.G.Z) == 0 &&
			/* For Y we may only know the parity bit, so compare only that */
			mbedtls_mpi_get_bit(&grp->G.Y, 0) == mbedtls_mpi_get_bit(&ref.G.Y, 0)) {
			break;
		}

	}

cleanup:
	mbedtls_ecp_group_free(&ref);

	*grp_id = *id;

	if (ret == 0 && *id == MBEDTLS_ECP_DP_NONE) {
		ret = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE;
	}

	return (ret);
}

/*
 * Parse a SpecifiedECDomain (SEC 1 C.2) and find the associated group ID
 */
static int pk_group_id_from_specified(const mbedtls_asn1_buf *params, mbedtls_ecp_group_id *grp_id)
{
	int ret;
	mbedtls_ecp_group grp;

	mbedtls_ecp_group_init(&grp);

	if ((ret = pk_group_from_specified(params, &grp)) != 0) {
		goto cleanup;
	}

	ret = pk_group_id_from_group(&grp, grp_id);

cleanup:
	mbedtls_ecp_group_free(&grp);

	return (ret);
}
#endif							/* MBEDTLS_PK_PARSE_EC_EXTENDED */

/*
 * Use EC parameters to initialise an EC group
 *
 * ECParameters ::= CHOICE {
 *   namedCurve         OBJECT IDENTIFIER
 *   specifiedCurve     SpecifiedECDomain -- = SEQUENCE { ... }
 *   -- implicitCurve   NULL
 */
static int pk_use_ecparams(const mbedtls_asn1_buf *params, mbedtls_ecp_group *grp)
{
	int ret;
	mbedtls_ecp_group_id grp_id;

	if (params->tag == MBEDTLS_ASN1_OID) {
		if (mbedtls_oid_get_ec_grp(params, &grp_id) != 0) {
			return (MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE);
		}
	} else {
#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED)
		if ((ret = pk_group_id_from_specified(params, &grp_id)) != 0) {
			return (ret);
		}
#else
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
#endif
	}

	/*
	 * grp may already be initilialized; if so, make sure IDs match
	 */
	if (grp->id != MBEDTLS_ECP_DP_NONE && grp->id != grp_id) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
	}

	if ((ret = mbedtls_ecp_group_load(grp, grp_id)) != 0) {
		return (ret);
	}

	return (0);
}

/*
 * EC public key is an EC point
 *
 * The caller is responsible for clearing the structure upon failure if
 * desired. Take care to pass along the possible ECP_FEATURE_UNAVAILABLE
 * return code of mbedtls_ecp_point_read_binary() and leave p in a usable state.
 */
static int pk_get_ecpubkey(unsigned char **p, const unsigned char *end, mbedtls_ecp_keypair *key)
{
	int ret;

	if ((ret = mbedtls_ecp_point_read_binary(&key->grp, &key->Q, (const unsigned char *)*p, end - *p)) == 0) {
		ret = mbedtls_ecp_check_pubkey(&key->grp, &key->Q);
	}

	/*
	 * We know mbedtls_ecp_point_read_binary consumed all bytes or failed
	 */
	*p = (unsigned char *)end;

	return (ret);
}
#endif							/* MBEDTLS_ECP_C */

#if defined(MBEDTLS_RSA_C)
/*
 *  RSAPublicKey ::= SEQUENCE {
 *      modulus           INTEGER,  -- n
 *      publicExponent    INTEGER   -- e
 *  }
 */
static int pk_get_rsapubkey(unsigned char **p, const unsigned char *end, mbedtls_rsa_context *rsa)
{
	int ret;
	size_t len;

	if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + ret);
	}

	if (*p + len != end) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	if ((ret = mbedtls_asn1_get_mpi(p, end, &rsa->N)) != 0 || (ret = mbedtls_asn1_get_mpi(p, end, &rsa->E)) != 0) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + ret);
	}

	if (*p != end) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	if ((ret = mbedtls_rsa_check_pubkey(rsa)) != 0) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY);
	}

	rsa->len = mbedtls_mpi_size(&rsa->N);

	return (0);
}
#endif							/* MBEDTLS_RSA_C */

/* Get a PK algorithm identifier
 *
 *  AlgorithmIdentifier  ::=  SEQUENCE  {
 *       algorithm               OBJECT IDENTIFIER,
 *       parameters              ANY DEFINED BY algorithm OPTIONAL  }
 */
static int pk_get_pk_alg(unsigned char **p, const unsigned char *end, mbedtls_pk_type_t *pk_alg, mbedtls_asn1_buf *params)
{
	int ret;
	mbedtls_asn1_buf alg_oid;

	memset(params, 0, sizeof(mbedtls_asn1_buf));

	if ((ret = mbedtls_asn1_get_alg(p, end, &alg_oid, params)) != 0) {
		return (MBEDTLS_ERR_PK_INVALID_ALG + ret);
	}

	if (mbedtls_oid_get_pk_alg(&alg_oid, pk_alg) != 0) {
		return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
	}

	/*
	 * No parameters with RSA (only for EC)
	 */
	if (*pk_alg == MBEDTLS_PK_RSA && ((params->tag != MBEDTLS_ASN1_NULL && params->tag != 0) || params->len != 0)) {
		return (MBEDTLS_ERR_PK_INVALID_ALG);
	}

	return (0);
}

/*
 *  SubjectPublicKeyInfo  ::=  SEQUENCE  {
 *       algorithm            AlgorithmIdentifier,
 *       subjectPublicKey     BIT STRING }
 */
int mbedtls_pk_parse_subpubkey(unsigned char **p, const unsigned char *end, mbedtls_pk_context *pk)
{
	int ret;
	size_t len;
	mbedtls_asn1_buf alg_params;
	mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
	const mbedtls_pk_info_t *pk_info;

	if ((ret = mbedtls_asn1_get_tag(p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	end = *p + len;

	if ((ret = pk_get_pk_alg(p, end, &pk_alg, &alg_params)) != 0) {
		return (ret);
	}

	if ((ret = mbedtls_asn1_get_bitstring_null(p, end, &len)) != 0) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + ret);
	}

	if (*p + len != end) {
		return (MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	if ((pk_info = mbedtls_pk_info_from_type(pk_alg)) == NULL) {
		return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
	}

	if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0) {
		return (ret);
	}
#if defined(MBEDTLS_RSA_C)
	if (pk_alg == MBEDTLS_PK_RSA) {
		ret = pk_get_rsapubkey(p, end, mbedtls_pk_rsa(*pk));
	} else
#endif							/* MBEDTLS_RSA_C */
#if defined(MBEDTLS_ECP_C)
		if (pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY) {
			ret = pk_use_ecparams(&alg_params, &mbedtls_pk_ec(*pk)->grp);
			if (ret == 0) {
				ret = pk_get_ecpubkey(p, end, mbedtls_pk_ec(*pk));
			}
		} else
#endif							/* MBEDTLS_ECP_C */
			ret = MBEDTLS_ERR_PK_UNKNOWN_PK_ALG;

	if (ret == 0 && *p != end) {
		ret = MBEDTLS_ERR_PK_INVALID_PUBKEY MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
	}

	if (ret != 0) {
		mbedtls_pk_free(pk);
	}

	return (ret);
}

#if defined(MBEDTLS_RSA_C)
/*
 * Parse a PKCS#1 encoded private RSA key
 */
static int pk_parse_key_pkcs1_der(mbedtls_rsa_context *rsa, const unsigned char *key, size_t keylen)
{
	int ret;
	size_t len;
	unsigned char *p, *end;

	p = (unsigned char *)key;
	end = p + keylen;

	/*
	 * This function parses the RSAPrivateKey (PKCS#1)
	 *
	 *  RSAPrivateKey ::= SEQUENCE {
	 *      version           Version,
	 *      modulus           INTEGER,  -- n
	 *      publicExponent    INTEGER,  -- e
	 *      privateExponent   INTEGER,  -- d
	 *      prime1            INTEGER,  -- p
	 *      prime2            INTEGER,  -- q
	 *      exponent1         INTEGER,  -- d mod (p-1)
	 *      exponent2         INTEGER,  -- d mod (q-1)
	 *      coefficient       INTEGER,  -- (inverse of q) mod p
	 *      otherPrimeInfos   OtherPrimeInfos OPTIONAL
	 *  }
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	end = p + len;

	if ((ret = mbedtls_asn1_get_int(&p, end, &rsa->ver)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (rsa->ver != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_VERSION);
	}

	if ((ret = mbedtls_asn1_get_mpi(&p, end, &rsa->N)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->E)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->D)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->P)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->Q)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->DP)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->DQ)) != 0 || (ret = mbedtls_asn1_get_mpi(&p, end, &rsa->QP)) != 0) {
		mbedtls_rsa_free(rsa);
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	rsa->len = mbedtls_mpi_size(&rsa->N);

	if (p != end) {
		mbedtls_rsa_free(rsa);
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
	}

	if ((ret = mbedtls_rsa_check_privkey(rsa)) != 0) {
		mbedtls_rsa_free(rsa);
		return (ret);
	}

	return (0);
}
#endif							/* MBEDTLS_RSA_C */

#if defined(MBEDTLS_ECP_C)
/*
 * Parse a SEC1 encoded private EC key
 */
static int pk_parse_key_sec1_der(mbedtls_ecp_keypair *eck, const unsigned char *key, size_t keylen)
{
	int ret;
	int version, pubkey_done;
	size_t len;
	mbedtls_asn1_buf params;
	unsigned char *p = (unsigned char *)key;
	unsigned char *end = p + keylen;
	unsigned char *end2;

	/*
	 * RFC 5915, or SEC1 Appendix C.4
	 *
	 * ECPrivateKey ::= SEQUENCE {
	 *      version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
	 *      privateKey     OCTET STRING,
	 *      parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
	 *      publicKey  [1] BIT STRING OPTIONAL
	 *    }
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	end = p + len;

	if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (version != 1) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_VERSION);
	}

	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if ((ret = mbedtls_mpi_read_binary(&eck->d, p, len)) != 0) {
		mbedtls_ecp_keypair_free(eck);
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	p += len;

	pubkey_done = 0;
	if (p != end) {
		/*
		 * Is 'parameters' present?
		 */
		if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0)) == 0) {
			if ((ret = pk_get_ecparams(&p, p + len, &params)) != 0 || (ret = pk_use_ecparams(&params, &eck->grp)) != 0) {
				mbedtls_ecp_keypair_free(eck);
				return (ret);
			}
		} else if (ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) {
			mbedtls_ecp_keypair_free(eck);
			return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
		}

		/*
		 * Is 'publickey' present? If not, or if we can't read it (eg because it
		 * is compressed), create it from the private key.
		 */
		if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1)) == 0) {
			end2 = p + len;

			if ((ret = mbedtls_asn1_get_bitstring_null(&p, end2, &len)) != 0) {
				return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
			}

			if (p + len != end2) {
				return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
			}

			if ((ret = pk_get_ecpubkey(&p, end2, eck)) == 0) {
				pubkey_done = 1;
			} else {
				/*
				 * The only acceptable failure mode of pk_get_ecpubkey() above
				 * is if the point format is not recognized.
				 */
				if (ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) {
					return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
				}
			}
		} else if (ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG) {
			mbedtls_ecp_keypair_free(eck);
			return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
		}
	}

	if (!pubkey_done && (ret = mbedtls_ecp_mul(&eck->grp, &eck->Q, &eck->d, &eck->grp.G, NULL, NULL)) != 0) {
		mbedtls_ecp_keypair_free(eck);
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if ((ret = mbedtls_ecp_check_privkey(&eck->grp, &eck->d)) != 0) {
		mbedtls_ecp_keypair_free(eck);
		return (ret);
	}

	return (0);
}
#endif							/* MBEDTLS_ECP_C */

/*
 * Parse an unencrypted PKCS#8 encoded private key
 */
static int pk_parse_key_pkcs8_unencrypted_der(mbedtls_pk_context *pk, const unsigned char *key, size_t keylen)
{
	int ret, version;
	size_t len;
	mbedtls_asn1_buf params;
	unsigned char *p = (unsigned char *)key;
	unsigned char *end = p + keylen;
	mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
	const mbedtls_pk_info_t *pk_info;

	/*
	 * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
	 *
	 *    PrivateKeyInfo ::= SEQUENCE {
	 *      version                   Version,
	 *      privateKeyAlgorithm       PrivateKeyAlgorithmIdentifier,
	 *      privateKey                PrivateKey,
	 *      attributes           [0]  IMPLICIT Attributes OPTIONAL }
	 *
	 *    Version ::= INTEGER
	 *    PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
	 *    PrivateKey ::= OCTET STRING
	 *
	 *  The PrivateKey OCTET STRING is a SEC1 ECPrivateKey
	 */

	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	end = p + len;

	if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (version != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_VERSION + ret);
	}

	if ((ret = pk_get_pk_alg(&p, end, &pk_alg, &params)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (len < 1) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + MBEDTLS_ERR_ASN1_OUT_OF_DATA);
	}

	if ((pk_info = mbedtls_pk_info_from_type(pk_alg)) == NULL) {
		return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
	}

	if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0) {
		return (ret);
	}
#if defined(MBEDTLS_RSA_C)
	if (pk_alg == MBEDTLS_PK_RSA) {
		if ((ret = pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk), p, len)) != 0) {
			mbedtls_pk_free(pk);
			return (ret);
		}
	} else
#endif							/* MBEDTLS_RSA_C */
#if defined(MBEDTLS_ECP_C)
		if (pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH) {
			if ((ret = pk_use_ecparams(&params, &mbedtls_pk_ec(*pk)->grp)) != 0 || (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk), p, len)) != 0) {
				mbedtls_pk_free(pk);
				return (ret);
			}
		} else
#endif							/* MBEDTLS_ECP_C */
			return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);

	return (0);
}

/*
 * Parse an encrypted PKCS#8 encoded private key
 */
#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
static int pk_parse_key_pkcs8_encrypted_der(mbedtls_pk_context *pk, const unsigned char *key, size_t keylen, const unsigned char *pwd, size_t pwdlen)
{
	int ret, decrypted = 0;
	size_t len;
	unsigned char buf[2048];
	unsigned char *p, *end;
	mbedtls_asn1_buf pbe_alg_oid, pbe_params;
#if defined(MBEDTLS_PKCS12_C)
	mbedtls_cipher_type_t cipher_alg;
	mbedtls_md_type_t md_alg;
#endif

	memset(buf, 0, sizeof(buf));

	p = (unsigned char *)key;
	end = p + keylen;

	if (pwdlen == 0) {
		return (MBEDTLS_ERR_PK_PASSWORD_REQUIRED);
	}

	/*
	 * This function parses the EncryptedPrivatKeyInfo object (PKCS#8)
	 *
	 *  EncryptedPrivateKeyInfo ::= SEQUENCE {
	 *    encryptionAlgorithm  EncryptionAlgorithmIdentifier,
	 *    encryptedData        EncryptedData
	 *  }
	 *
	 *  EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
	 *
	 *  EncryptedData ::= OCTET STRING
	 *
	 *  The EncryptedData OCTET STRING is a PKCS#8 PrivateKeyInfo
	 */
	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	end = p + len;

	if ((ret = mbedtls_asn1_get_alg(&p, end, &pbe_alg_oid, &pbe_params)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if ((ret = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING)) != 0) {
		return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret);
	}

	if (len > sizeof(buf)) {
		return (MBEDTLS_ERR_PK_BAD_INPUT_DATA);
	}

	/*
	 * Decrypt EncryptedData with appropriate PDE
	 */
#if defined(MBEDTLS_PKCS12_C)
	if (mbedtls_oid_get_pkcs12_pbe_alg(&pbe_alg_oid, &md_alg, &cipher_alg) == 0) {
		if ((ret = mbedtls_pkcs12_pbe(&pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT, cipher_alg, md_alg, pwd, pwdlen, p, len, buf)) != 0) {
			if (ret == MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH) {
				return (MBEDTLS_ERR_PK_PASSWORD_MISMATCH);
			}

			return (ret);
		}

		decrypted = 1;
	} else if (MBEDTLS_OID_CMP(MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128, &pbe_alg_oid) == 0) {
		if ((ret = mbedtls_pkcs12_pbe_sha1_rc4_128(&pbe_params, MBEDTLS_PKCS12_PBE_DECRYPT, pwd, pwdlen, p, len, buf)) != 0) {
			return (ret);
		}
		// Best guess for password mismatch when using RC4. If first tag is
		// not MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE
		//
		if (*buf != (MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) {
			return (MBEDTLS_ERR_PK_PASSWORD_MISMATCH);
		}

		decrypted = 1;
	} else
#endif							/* MBEDTLS_PKCS12_C */
#if defined(MBEDTLS_PKCS5_C)
		if (MBEDTLS_OID_CMP(MBEDTLS_OID_PKCS5_PBES2, &pbe_alg_oid) == 0) {
			if ((ret = mbedtls_pkcs5_pbes2(&pbe_params, MBEDTLS_PKCS5_DECRYPT, pwd, pwdlen, p, len, buf)) != 0) {
				if (ret == MBEDTLS_ERR_PKCS5_PASSWORD_MISMATCH) {
					return (MBEDTLS_ERR_PK_PASSWORD_MISMATCH);
				}

				return (ret);
			}

			decrypted = 1;
		} else
#endif							/* MBEDTLS_PKCS5_C */
		{
			((void)pwd);
		}

	if (decrypted == 0) {
		return (MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE);
	}

	return (pk_parse_key_pkcs8_unencrypted_der(pk, buf, len));
}
#endif							/* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */

/*
 * Parse a private key
 */
int mbedtls_pk_parse_key(mbedtls_pk_context *pk, const unsigned char *key, size_t keylen, const unsigned char *pwd, size_t pwdlen)
{
	int ret;
	const mbedtls_pk_info_t *pk_info;

#if defined(MBEDTLS_PEM_PARSE_C)
	size_t len;
	mbedtls_pem_context pem;

	mbedtls_pem_init(&pem);

#if defined(MBEDTLS_RSA_C)
	/* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
	if (keylen == 0 || key[keylen - 1] != '\0') {
		ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
	} else {
		ret = mbedtls_pem_read_buffer(&pem, "-----BEGIN RSA PRIVATE KEY-----", "-----END RSA PRIVATE KEY-----", key, pwd, pwdlen, &len);
	}

	if (ret == 0) {
		if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == NULL) {
			return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
		}

		if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 || (ret = pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk), pem.buf, pem.buflen)) != 0) {
			mbedtls_pk_free(pk);
		}

		mbedtls_pem_free(&pem);
		return (ret);
	} else if (ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) {
		return (MBEDTLS_ERR_PK_PASSWORD_MISMATCH);
	} else if (ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) {
		return (MBEDTLS_ERR_PK_PASSWORD_REQUIRED);
	} else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
		return (ret);
	}
#endif							/* MBEDTLS_RSA_C */

#if defined(MBEDTLS_ECP_C)
	/* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
	if (keylen == 0 || key[keylen - 1] != '\0') {
		ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
	} else {
		ret = mbedtls_pem_read_buffer(&pem, "-----BEGIN EC PRIVATE KEY-----", "-----END EC PRIVATE KEY-----", key, pwd, pwdlen, &len);
	}
	if (ret == 0) {
		if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == NULL) {
			return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
		}

		if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 || (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk), pem.buf, pem.buflen)) != 0) {
			mbedtls_pk_free(pk);
		}

		mbedtls_pem_free(&pem);
		return (ret);
	} else if (ret == MBEDTLS_ERR_PEM_PASSWORD_MISMATCH) {
		return (MBEDTLS_ERR_PK_PASSWORD_MISMATCH);
	} else if (ret == MBEDTLS_ERR_PEM_PASSWORD_REQUIRED) {
		return (MBEDTLS_ERR_PK_PASSWORD_REQUIRED);
	} else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
		return (ret);
	}
#endif							/* MBEDTLS_ECP_C */

	/* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
	if (keylen == 0 || key[keylen - 1] != '\0') {
		ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
	} else {
		ret = mbedtls_pem_read_buffer(&pem, "-----BEGIN PRIVATE KEY-----", "-----END PRIVATE KEY-----", key, NULL, 0, &len);
	}
	if (ret == 0) {
		if ((ret = pk_parse_key_pkcs8_unencrypted_der(pk, pem.buf, pem.buflen)) != 0) {
			mbedtls_pk_free(pk);
		}

		mbedtls_pem_free(&pem);
		return (ret);
	} else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
		return (ret);
	}
#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
	/* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
	if (keylen == 0 || key[keylen - 1] != '\0') {
		ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
	} else {
		ret = mbedtls_pem_read_buffer(&pem, "-----BEGIN ENCRYPTED PRIVATE KEY-----", "-----END ENCRYPTED PRIVATE KEY-----", key, NULL, 0, &len);
	}
	if (ret == 0) {
		if ((ret = pk_parse_key_pkcs8_encrypted_der(pk, pem.buf, pem.buflen, pwd, pwdlen)) != 0) {
			mbedtls_pk_free(pk);
		}

		mbedtls_pem_free(&pem);
		return (ret);
	} else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
		return (ret);
	}
#endif							/* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */
#else
	((void)ret);
	((void)pwd);
	((void)pwdlen);
#endif							/* MBEDTLS_PEM_PARSE_C */

	/*
	 * At this point we only know it's not a PEM formatted key. Could be any
	 * of the known DER encoded private key formats
	 *
	 * We try the different DER format parsers to see if one passes without
	 * error
	 */
#if defined(MBEDTLS_PKCS12_C) || defined(MBEDTLS_PKCS5_C)
	if ((ret = pk_parse_key_pkcs8_encrypted_der(pk, key, keylen, pwd, pwdlen)) == 0) {
		return (0);
	}

	mbedtls_pk_free(pk);

	if (ret == MBEDTLS_ERR_PK_PASSWORD_MISMATCH) {
		return (ret);
	}
#endif							/* MBEDTLS_PKCS12_C || MBEDTLS_PKCS5_C */

	if ((ret = pk_parse_key_pkcs8_unencrypted_der(pk, key, keylen)) == 0) {
		return (0);
	}

	mbedtls_pk_free(pk);

#if defined(MBEDTLS_RSA_C)
	if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA)) == NULL) {
		return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
	}

	if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 || (ret = pk_parse_key_pkcs1_der(mbedtls_pk_rsa(*pk), key, keylen)) == 0) {
		return (0);
	}

	mbedtls_pk_free(pk);
#endif							/* MBEDTLS_RSA_C */

#if defined(MBEDTLS_ECP_C)
	if ((pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == NULL) {
		return (MBEDTLS_ERR_PK_UNKNOWN_PK_ALG);
	}

	if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 || (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk), key, keylen)) == 0) {
		return (0);
	}

	mbedtls_pk_free(pk);
#endif							/* MBEDTLS_ECP_C */

	return (MBEDTLS_ERR_PK_KEY_INVALID_FORMAT);
}

/*
 * Parse a public key
 */
int mbedtls_pk_parse_public_key(mbedtls_pk_context *ctx, const unsigned char *key, size_t keylen)
{
	int ret;
	unsigned char *p;
#if defined(MBEDTLS_PEM_PARSE_C)
	size_t len;
	mbedtls_pem_context pem;

	mbedtls_pem_init(&pem);

	/* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
	if (keylen == 0 || key[keylen - 1] != '\0') {
		ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
	} else {
		ret = mbedtls_pem_read_buffer(&pem, "-----BEGIN PUBLIC KEY-----", "-----END PUBLIC KEY-----", key, NULL, 0, &len);
	}

	if (ret == 0) {
		/*
		 * Was PEM encoded
		 */
		key = pem.buf;
		keylen = pem.buflen;
	} else if (ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT) {
		mbedtls_pem_free(&pem);
		return (ret);
	}
#endif							/* MBEDTLS_PEM_PARSE_C */
	p = (unsigned char *)key;

	ret = mbedtls_pk_parse_subpubkey(&p, p + keylen, ctx);

#if defined(MBEDTLS_PEM_PARSE_C)
	mbedtls_pem_free(&pem);
#endif

	return (ret);
}

#endif							/* MBEDTLS_PK_PARSE_C */
